Editing Scroll Lock (section)

===Boot diagnostics===
In [[Multiuser DOS]], [[Datapac System Manager|System Manager]], and [[REAL/32]], activating {{keypress|Scroll Lock}} during boot will always enter a special diagnostic mode, where the operating system and loaded device drivers will display detailed status and debugging information about themselves and their interaction with the operating system, sometimes up to several screenfulls per loaded driver.<ref name="Paul_1997_OD-A3"/> Automatic scrolling is suspended for as long as {{keypress|Scroll Lock}} remains activated.<ref name="CCI_1997_HELP"/>

[[DR-DOS 7.02]] and higher provides a [[CONFIG.SYS]] directive named <code>[[SCROLLOCK (CONFIG.SYS directive)|SCROLLOCK]]=ON|OFF</code> to change the Scroll Lock status on the fly.<ref name="Paul_1997_OD-A3"/> Activating {{keypress|Scroll Lock}} during boot will enter a DIAG mode as well, wherein some special drivers may display more verbose messages,<ref name="Paul_1997_OD-A3"/> but in contrast to the situation under the Multiuser DOS family normal DOS drivers do not typically display additional information. The operating system, however, will temporarily suspend any automatic timeouts (<code>[[TIMEOUT (CONFIG.SYS directive)|TIMEOUT]]=<nowiki><seconds>,<character>,<switch></nowiki></code>) in CONFIG.SYS trace (<code>[[TRACE (CONFIG.SYS directive)|TRACE]]=ON|OFF</code>) and {{keypress|F7}}/{{keypress|F8}} single-stepping modes for as long as {{keypress|Scroll Lock}} is active.<ref name="Paul_1997_OD-A3"/>